<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="bootstrap-3.4.1-dist/js/jquery-3.6.0.min.js"></script>
  <script src="bootstrap-3.4.1-dist/js/bootstrap.min.js"></script>
  <link rel="stylesheet" href="./bootstrap-3.4.1-dist/css/bootstrap.min.css">
  <title>栅格系统</title>
  <style>
    #base>.row>div{
      border:1px solid red;
    }
  </style>
</head>
<body>
  <div id="base" class="container">
    <div class="row">
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列01</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列02</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列03</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列04</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列05</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列06</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列07</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列08</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列09</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列10</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列11</div>
      <div class="col-md-2 col-lg-1 col-sm-4 col-xs-6">测试列12</div>
    </div>
    <div class="row">
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试01</div>
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试02</div>
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试03</div>
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试04</div>
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试05</div>
      <div class="col-md-2 col-sm-4 col-xs-6">再次测试06</div>
    </div>
  </div>
  <!--6 3 2-->
</body>
</html>